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/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "zbxwin32.h"
#include "zbxstr.h"
#include "log.h"
/******************************************************************************
* *
* Purpose: get file system cluster size for specified path (for cases when *
* the file system is mounted on empty NTFS directory) *
* *
* Parameters: path - [IN] file system path *
* error - [OUT] error message *
* *
* Return value: On success, nonzero cluster size is returned *
* On error, 0 is returned. *
* *
******************************************************************************/
zbx_uint64_t zbx_get_cluster_size(const char *path, char **error)
{
wchar_t *disk = NULL, *wpath = NULL;
unsigned long sectors_per_cluster, bytes_per_sector, path_length;
zbx_uint64_t res = 0;
char *err_msg = "Cannot obtain file system cluster size:";
wpath = zbx_utf8_to_unicode(path);
/* Here GetFullPathName() is used in multithreaded application. */
/* We assume it is safe because: */
/* - only file names with absolute paths are used (i.e. no relative paths) and */
/* - SetCurrentDirectory() is not used in Zabbix agent. */
if (0 == (path_length = GetFullPathName(wpath, 0, NULL, NULL) + 1))
{
*error = zbx_dsprintf(*error, "%s GetFullPathName() failed: %s", err_msg,
strerror_from_system(GetLastError()));
goto err;
}
disk = (wchar_t *)zbx_malloc(NULL, path_length * sizeof(wchar_t));
if (0 == GetVolumePathName(wpath, disk, path_length))
{
*error = zbx_dsprintf(*error, "%s GetVolumePathName() failed: %s", err_msg,
strerror_from_system(GetLastError()));
goto err;
}
if (0 == GetDiskFreeSpace(disk, §ors_per_cluster, &bytes_per_sector, NULL, NULL))
{
*error = zbx_dsprintf(*error, "%s GetDiskFreeSpace() failed: %s", err_msg,
strerror_from_system(GetLastError()));
goto err;
}
res = (zbx_uint64_t)sectors_per_cluster * bytes_per_sector;
err:
zbx_free(disk);
zbx_free(wpath);
return res;
}
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